Slate-picking mechanism



(No Model.) 4 Shets-Sheet i.

E. B. GOXE.

SLATE PIGKING MECHANISM.

No. 450,482. Patented Apr. 14, 1891.

(No Model.) 4'Sheets-Shee1: 2.

E. B. GOXE.

' SLATE PIGKING MECHANISM.

No. 450,482. I Patented Apr. 14, 1891.

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E. B. GOXE.

SLATE PIGKING MEGHANISM.

No. 450,482. Patented Apr. 14, 1891.

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(No Model.)

B. B. GOXE.

SLATE PIGKING MECHANISM.

No. 450.432. Patented Apr. 14,1891.

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inclined chute in which is placed the slate- UNITED STATES PATENTGrinch.

EOKLEY l3. COXE, OF DRIFTON, PENNSYLVANIA.

SLATE-PICKING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 450,482, dated April14, 1891. Application filed July 19, 1890. Serial No. 359,277. (Nomodel.)

To aZZ whom, it may concern:

Be it known that I, EOKLEY B. (30153, of Drifton, in the county ofLuzerne, and in the State of Pennsylvania, have invented certain new anduseful Improvements in Slate-Picking Mechanism; and I do hereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, in which Figure 1 is aperspective View of my mechanism as preferably constructed and arrangedfor use. Fig. 2 is a plan view of the same from the upper side. Figs. 3and i are sections upon lines 00 {r and y y, respectively, of Fig. 2.Fig. 5 is a perspective view of one of the supporting-rollers and itsbearings separated from each other. Fig. 6 is a vertical central sectionof the same when combined; and Fig. 7 is a perspective view of myimprovements as combined with screening meclr anism.

Letters of like name and kind refer to like parts in each of thefigures.

, My invention is an improvement upon a slate-picking mechanism forwhich Letters Patent No. 882,215 were granted upon the 1st day of May,1888, in which the slate is separated from the coal by passing both downan separating device with its faces havinga lateral inclination, so thatthe action of gravity will cause the slate to pass laterally over suchfaces and through the slots into the slatechute below.

The object of this invention is to increase the efficiency and capacityof such slate-picking mechanism; and to such end my said inventionconsists, principally, in a slate-picking screen having substantiallythe features shown, in combination with means whereby it is given agyratory motion in a horizontal plane, substantially as and for thepurpose hereinafter specified.

It consists, further, in details of construction, substantially as andfor the purpose hereinafter shown.

In the carrying of my invention into practice I employ a rectangularframe A, which has the form of a tray with one of its ends cut off, andupon or near each of its corners secure upon opposite sides plates at a,&c., that extend horizontally outward and from or near its top edge andhave each, secured to its lower face a circular plate B, which has theform shown in Figs. 5 and 6.

For the support of the frame A, I secure upon two cross-bars C and O,that'are connected with an oblong open frame D, four plates B B, &c.,which correspond in construction to the plates B B, &c., and have thesame relative arrangement, and upon each of said plates B B, &c., Iplace a roller E, that has the form of a double cone, as shown in Figs.5 and 6. Said frame A is now placed in position. with the plates orbearings 13 B, &c., resting upon the rollers E and E, &c.,-when by theuse of a comparatively small power said frame A may be caused to gyratein a horizontal plane.

Motion is imparted to the frame A by means of two crank-shafts F and F,which are journaled vertically upon opposite sides thereof and havetheir cranks ff engaged by boxes G G, that are secured upon thecontiguous sides of said frame. Said crank-shafts are caused to rotatein one and the same direction at uniform velocity andgive to said framea steady gyratory motion.

About one-half of the bottom of the frame A is cut away, and over thesame is secured a screen H, that has the usual round openings h h, &c.,through which pieces of coal may pass, while between such screen and theopen end of such frame is placed a second screen I, that, as seen inFigs. 2 and 4, consists of a plate that is provided with a series ofparallel laterally-inclined faces M, which are separated, except attheir ends, by narrow slots 1." 2". The screen I is arranged withitsslots 1" i in a line with the longitudinal axis of the screen-frame A,and beneath the same is provided a chute K, which receives and conveysaway such substances as may pass through its said slots. If now thescreenframe is caused to gyrate and material to be screened is permittedto fall upon the screen H, such coal contained therein as is adapted topass through the openings h h, 850., will fall through said screen,whilethe remainder of the material will pass upon and over the screen I, andthe slate, which has usually a flat form, together with fiat pieces ofcoal, will pass downward through the slots ii. culiar motion given tosaid screens materially facilitates the separation of the coal andslate, and also renders the operation more thorough than would otherwisebe practicable.

The construction shown is such as is preferably used; but I also proposeto combine the slate-separating screen with one screen, or each screenof the mechanisms shown in Fig. '7, and when it is desired to producegrades of coal which shall be more'than ordinarily free from flat piecesand slate I propose to provide each of the screens of two screeningmechanisms with the slate-separating screens and cause the material fromone of such mechanisms to pass through the other mechanism.

WVhile the slate-separating screen shown is preferably used, I do notconfine myself to the same, as other forms will secure a like resultwhen operated in the same manner.

Having thus described my invention, what I claim is- 1. In combination,a coal-screen, a slatepieker receiving mixed coal and slate therefrom,consisting of a plate having a series of inclined faces separated byslots for the passage of slate, and suitable means for vibrating saidscreens, substantially as and for the purpose shown.

2. In combination with a vibratory supporting-frame, a perforated plateforming a coalsereen, a plate having a series of inclined facesseparatedbyslots,formingaslatepicker,

The peand the slate receiving and discharging chute beneath the latter,substantially as and for the purpose shown.

3. In combination, a stationary supportingframe, a vibratory framejournaled therein, a plate having a series of inclined faces separatedby slots forming a slate-separating screen carried by said vibratoryframe, and the two crankshafts connected to the latter at oppositesides, substantially as and for the purpose set forth.

4. As an improvement in means for separating slate from coal, incombination with a suitably-journaled vibratory frame and means foroperating the same, a slate-picker composed of a plate having aseries ofinclined faces separated by slots, substantially as and for the purposeshown.

5. As an improvement in means for separating coal and slate, incombination, a coalscreen, a slate-picker receiving mixed coal and slatetherefrom, consisting of a plate having a series of inclined facesseparated by slots for the passage of slate, a supportingframe for saidparts, and suitable means for journaling and gyrating the same,substantially as and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand this25th day of June, 1890.

ECKLEY I3. COXE.

Witnesses:

HARRY J. DAVIS, IlELLIoT'r A. OBERRENDER.

